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Amino AcidsThe amino acid requirementsof swine and poultry havebeen well defined. Aminoacid concentrations of cornwet milled feeds are expressedas a percentage of thefeed in Table 5. Corn germmeal contains the highestquality protein of the fourfeedstuffs, as it is nearly adequatein lysine, methionineand tryptophan. Corn glutenmeal is high in methionineand essential amino acids.This is very useful to the feedmanufacturer in that it allowsutilization of low-proteinfeedstuffs in combinationwith corn gluten meal toformulate a nutritionallybalanced diet at the lowestcost. Corn gluten feed canserve as a useful amino acidsource in swine and poultrydiets when synthetic aminoacids or natural proteinsources are added thatcomplement its amino acidprofile.Dietary amino acid requirementsof ruminants are lesswell defined than are those ofswine or poultry because themicrobial population in therumen converts both feedprotein and non-protein nitrogento microbial protein.Optimum protein utilizationoccurs in the ruminant whenjust enough dietary protein isdegraded in the rumen tosupport maximum microbialprotein synthesis with theremainder being digested inthe small intestine. Corngluten meal is ideal for ruminantsbecause 60 to 70 percentof the protein escapesruminal digestion and isavailable in the small intestine.Corn gluten meal is alsohigh in methionine which isoften times the first-limitingamino acid in microbial pro-Table 4.Mineral Content of Corn Wet Milled FeedsUnit Corn Gluten Corn Gluten Corn Germ Corn SteepFeed Meal Meal LiquorDry Matter % 90 90 90 50Calcium % 0.05 .07 .04 .14Phosphorus % 1.00 .48 .30 1.80Potassium % 1.50 .20 .34 2.40Magnesium % 0.50 .08 .30 0.70Sulfur % 0.30 .65 .30 0.60Sodium % 0.15 .06 .07 0.11Iron ppm 363 282 337 110Zinc ppm 250 31 92 70Manganese ppm 58 7 4 29Copper ppm 13 24 4 1522